Answer:
A. Charge people money to see the frog
Explanation:
Magical realism, also called fabulism, often contains critiques about the human or societal behavior. As the question says itself: "in a magical realistic story usually stay stuck in the troubling part of human existence". Chances are, the character that finds the frog will use it to his or her own personal gain. The only option that fits this idea is option A.